单项选择题

Sir Liam Donaldson suggested that ______.

A．one should exercise 30 minutes a week
B．one should try different activities everyday
C．one should exercise moderately on a regular basis
D．one should avoid smoking

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单项选择题

According to the passage, which of the following statements is true

A．Diet is the most important factor for reducing obesity.
B．Physical exercise is important for reducing obesity.
C．Keeping a good mood is essential for reducing obesity.
D．Going to the gym is key for reducing obesity.